/*
 * Copyright 2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package be.free.ts.support.web;

import com.google.gwt.inject.client.AsyncProvider;
import com.google.gwt.user.client.rpc.AsyncCallback;
import net.customware.gwt.presenter.client.Presenter;
import net.customware.gwt.presenter.client.place.PlaceRequest;
import net.customware.gwt.presenter.client.place.PresenterPlace;

/**
 * @author Christophe De Blende
 * @since 07/01/13
 */
public abstract class AsyncProvidedPresenter<T extends Presenter> extends PresenterPlace<T> {

	private final AsyncProvider<T> presenterAsyncProvider;

	private T presenterProvider;

	protected AsyncProvidedPresenter(AsyncProvider<T> presenterAsyncProvider) {
		this.presenterAsyncProvider = presenterAsyncProvider;
	}

	@Override
	public T getPresenter() {
		presenterAsyncProvider.get(new AsyncCallback<T>() {
			@Override
			public void onFailure(Throwable caught) {
			}

			@Override
			public void onSuccess(final T result) {
				presenterProvider = result;
			}
		});
		return presenterProvider;
	}

	@Override
	protected void preparePresenter(PlaceRequest request, T presenter) {
		// Do nothing
	}

	@Override
	protected PlaceRequest prepareRequest(PlaceRequest request, T presenter) {
		return request;
	}
}
